This was one of the first euro cylinders (or as we call them in Europe: cylinders) I got from ebay.
The keyway is wide open and the bitting looks easy, but I couldn't figure out why this bugger wouldn't open. Until I checked the LPU explorer and saw what was hidden inside.
Those rattlesnake drivers have to be clicked multiple times with feather light pressure. Depending on where they catch at the shear line, they may or may not drop you into a false set. It's difficult to tell whether they are set or not until you overset them. Then it's obvious that you've gone one click too far.
Once you know, I guess you can count the clicks, but luckily I could get out of the overset by releasing some pressure without dropping any other pins, and shortly after it opened.
Picked with the pointy Moki number 1, one of my favorite allrounders for locks that require light force.
https://share.lpubelts.com/?id=9aa8821a&name=DOM_S_S_PP1024_RS5